Stark effect measurements in high temperature molecules: Hyperfine structure and stark effect in the rotational spectrum of the silver iodide molecule

In the region of 8 GHz the rotational transition of J = 3 → 2 of both isotopic species of AgI has been investigated. The analysis of the quadrupole hyperfine structure in the vibrational states up to v = 4 resulted in the v-dependent coupling constant

$\text{eq}{}_{\mathrm{v}}\text{Q}\text{(}{}^{127}\text{I}\text{) = { ? 1061.37(40) ? 2.13(20)(v +}\text{1}\text{2}\text{) }}\text{MHz}$

. From observations of the Stark pattern of ¹⁰⁷AgI in its ground vibrational state we derived the electric dipole moment

$\text{|μ}{}_{\mathrm{O}}\text{| = 5.10 (15)}\text{D}$

.